GB933990A - Synchronous capacitor for providing reactive power, particularly when load surges occur - Google Patents
Synchronous capacitor for providing reactive power, particularly when load surges occurInfo
- Publication number
- GB933990A GB933990A GB22674/61A GB2267461A GB933990A GB 933990 A GB933990 A GB 933990A GB 22674/61 A GB22674/61 A GB 22674/61A GB 2267461 A GB2267461 A GB 2267461A GB 933990 A GB933990 A GB 933990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- current
- rotor
- phase
- transformers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
933,990. Automatic power factor control; induction generators. BROWN, BOVERI & CO. Ltd. June 22, 1961 [June 24, 1960], No. 22674/61. Classes 35 and 38 (4). The power factor of an A.C. supply system is controlled by automatically controlling the phase and amplitude of the current supplied to the wound rotor of an asynchronous motor, the stator of which is connected to the supply system. The required active component of rotor current (to overcome losses) is computed by measuring the rotor speed by means of a D.C. tachometer generator 8, comparing the speed signal with a reference signal at 12a and modulating the error signal at 13 to produce a 3 phase error signal at mains frequency. This signal is in turn modulated at 14, 15, 16 by the output of an A.C. tachometer generator 9 to provide at 14d, 15d, 16d a 3-phase error signal at slip frequency. The required reactive component of rotor current is computed by multiplying at 17 the outputs of current transformers 5 and potential transformers 6. The transformers are paired off appropriately to provide a 90 degrees phase shift of the voltage signal with respect to the current. The reactive V.A. signal from multipliers 17 is compared at 18a with a reference signal and the resulting error signal is modulated first to 3 phase mains frequency at 19, and then modulated at 20, 21, 22 to provide a 3 phase slip frequency signal at 20d, 21d, 22d. The computed active and reactive rotor current signals are now combined in an undisclosed manner at 70 and compared at 23a with the actual rotor current, measured by current transformers 7, and the resultant is used to control, in an undisclosed manner, the reversed pairs of rectifiers 2 that form a frequency converter for supplying the rotor of the motor at slip frequency from the supply mains. The rectifiers 2 may be grid controlled valves (as shown) or silicon-controlled rectifiers, Fig. 1 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB58324A DE1139916B (en) | 1960-06-24 | 1960-06-24 | Phase shifter for reactive power coverage, especially with load surges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB933990A true GB933990A (en) | 1963-08-14 |
Family
ID=6972030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22674/61A Expired GB933990A (en) | 1960-06-24 | 1961-06-22 | Synchronous capacitor for providing reactive power, particularly when load surges occur |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3191116A (en) |
| BE (1) | BE605350A (en) |
| CH (1) | CH387778A (en) |
| DE (1) | DE1139916B (en) |
| GB (1) | GB933990A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948209A (en) * | 1989-01-01 | 1990-08-14 | Westinghouse Electric Corp. | VSCF starter/generator systems |
| CN102301584B (en) * | 2009-01-30 | 2015-03-25 | 西门子公司 | Method for frequency and power swing of wind turbine system and stability utility system |
| CN112230162B (en) * | 2019-06-27 | 2024-06-18 | 南京南瑞继保工程技术有限公司 | Abnormal power failure judging method and device for synchronous phase modulation unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE634426C (en) * | 1932-04-07 | 1936-08-31 | Siemens Schuckertwerke Akt Ges | Device for regulating AC power lines |
| US3012185A (en) * | 1960-03-14 | 1961-12-05 | Siegler Corp | Frequency control apparatus for alternators |
-
1960
- 1960-06-24 DE DEB58324A patent/DE1139916B/en active Pending
-
1961
- 1961-06-16 CH CH709361A patent/CH387778A/en unknown
- 1961-06-19 US US118145A patent/US3191116A/en not_active Expired - Lifetime
- 1961-06-22 GB GB22674/61A patent/GB933990A/en not_active Expired
- 1961-06-23 BE BE605350A patent/BE605350A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE605350A (en) | 1961-10-16 |
| CH387778A (en) | 1965-02-15 |
| US3191116A (en) | 1965-06-22 |
| DE1139916B (en) | 1962-11-22 |
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